linux-kernel - Re: sound/soc/codecs/src4xxx-i2c.c:28:34: warning: unused variable 'src4xxx_of

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Message-ID: <4f2e69e1-c9a2-0197-341c-c8c0bc9fda1c@flatmax.com>
Date:   Fri, 7 Oct 2022 10:51:11 +1100
From:   Matt Flax <flatmax@...tmax.com>
To:     kernel test robot <lkp@...el.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: Re: sound/soc/codecs/src4xxx-i2c.c:28:34: warning: unused variable
 'src4xxx_of_match'

Hi all,

Can this test system be updated to catch of_match_ptr usage ?

Here is the decleration :

static const struct of_device_id src4xxx_of_match[] = {
     { .compatible = "ti,src4392", },
     { }
};
MODULE_DEVICE_TABLE(of, src4xxx_of_match);

Here is the usage (in the same file) :

static struct i2c_driver src4xxx_i2c_driver = {
     .driver = {
         .name = "src4xxx",
         .of_match_table = of_match_ptr(src4xxx_of_match),


On 7/10/22 04:21, kernel test robot wrote:
> Hi Matt,
>
> FYI, the error/warning still remains.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   833477fce7a14d43ae4c07f8ddc32fa5119471a2
> commit: 4e6bedd3c396014ba70de2b4c9995c8e024e82b3 ASoC: codecs: add support for the TI SRC4392 codec
> date:   8 weeks ago
> config: hexagon-randconfig-r045-20221006
> compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
> reproduce (this is a W=1 build):
>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>          chmod +x ~/bin/make.cross
>          # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4e6bedd3c396014ba70de2b4c9995c8e024e82b3
>          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>          git fetch --no-tags linus master
>          git checkout 4e6bedd3c396014ba70de2b4c9995c8e024e82b3
>          # save the config file
>          mkdir build_dir && cp config build_dir/.config
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash sound/soc/codecs/
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
>
> All warnings (new ones prefixed by >>):
>
>>> sound/soc/codecs/src4xxx-i2c.c:28:34: warning: unused variable 'src4xxx_of_match' [-Wunused-const-variable]
>     static const struct of_device_id src4xxx_of_match[] = {
>                                      ^
>     1 warning generated.
>
>
> vim +/src4xxx_of_match +28 sound/soc/codecs/src4xxx-i2c.c
>
>      27	
>    > 28	static const struct of_device_id src4xxx_of_match[] = {
>      29		{ .compatible = "ti,src4392", },
>      30		{ }
>      31	};
>      32	MODULE_DEVICE_TABLE(of, src4xxx_of_match);
>      33	
>      34	
>